Regulating the working of internal-combustion engines



T. D. KELLY March 12,1929.

REGULATING THE WORKING OF INTERNAL COMBUSTION ENGINES Filed May 5, 1927War -22% Patented Mar. 12, 1929.. I I

UNE'EED SEATES T .osrics.

THOMAS DANIEL KELLY, 6F LONDON, ENGLAND.

REGULATING THE WORKING OF INTERNAL-COMBUSTION ENGINES.

Application filed May 5, 1927, Serial No. 189,113, and in Great BritainMarch 17, 1827.

For the purpose of my present invention, by cutting off the fuel orcombustible mixture supply to tie spaces on top of the larger diameterpiston or between the pistons (by means of suitable valves connectingwith the inlet pipes), that portion of the engine then only draws in airfor cooling through inlet 7 valves, whereby the number of impulses percylinder can be regulated as desired and any one or all the spaces usedfor creating power.

My invention will be more fully understood from the followingdescription aided by the annexed drawing which is a sectional elevationof a portion of an engine showing a cylinder A of two diameters A, B,the portion B being eccentric to the portion A. I

At near one end of the portion A. is positioned a single piston Cconnected by a rod D to the crank E of the driving shaft F and in thelarger and eccentric portion B and also in the portion A is positioned adouble di ameter piston G, H, the portion G fitting the cylinder portionA whilst the portion H which is eccentric to the portion G fits theportion B of the cylinder, and such piston G, H from the greaterdiameter H is connected by a rod 1 to a crank J on the crank shaft F,the two cranks being oppositely arranged vso that the pistons C and G, Hmove towards and away from each other.

The fuel or combustible mixture inlet to the chamber K between the twopistons'C and G, H and the inlet to the chamber L above the piston G, Hare connected by a pipe M and this in turn is connected by a branchstroke cycle and the various functions arev performed in the spaces K,L, as will be well understood, but should it be desired to reduce thepower by closing one of the valves V the combustible mixture will be cutoff from the corresponding space and the reciprocating action of thepiston will draw air through the valve V into the spaces and cool theengine reducing the number of explosions tion chambers to regulate thepower output and permit air to enter the same, as before set forth.

What Id'o claim as my invention and desire to secure by Leters Patentis:

Inv an explosive engine, a double diametered cylinder, a double crankshaft, a single diametered piston connected to one of the cranks andmounted in the cylinder, a double diametered piston mounted in the cylin'der and operably connected to the other crank, the reduced end thereofcooperating with the first piston and providing an explosive chamber inthe cylinder between said pistons, there being provided in the en largeddiametered portion of the cylinder above the similar diametered portionof the piston a second combustion chamber, a valvecontrolled air inletport and a valve-con trolled exhaust port provided for each combustionchamber, a main fuel supply, two conduits leading therefrom andconnected respectively to the two combustion chambers, in-take valvescontrolling said entrances to the combustion chamber, and twoselectively operated valves mounted in the conduit whereby either one ofthe combustion chambers can be isolated from said con,- duit and thefuel cut off selectively there- ,from. p i V In testimony whereof I havehereunto set my hand.

THOMAS DANIEL KELLY.

